Add vendor_available: true

Make libext2-headers and libext2_uuid available to vendor and
product. They are required by f2fs-tools which are installed in
product partition.

Bug: 120954888
Bug: 145580164
Test: set PRODUCT_PRODUCT_VNDK_VERSION := current and build
Change-Id: Ibf5678448f9efbcb72c0544a3a50280fbfee2f38
2 files changed